Wasp preventer for a Flow Hive

Is there a device you can put at the entrance of a Flow Hive to prevent wasps from entering the hive?

I was just going to ask this question. I have been told that wasps are a problem where I have my new hive. Looking forward to answers.

I use mouse guards but you just need to reduce the entrance hole best you can if wasps are a problem.

I don’t know of any device available but the best defense against wasps is a smaller entrance, I’m in a sub-tropical climate and have reduced my entrances to about 6" and only seen benefits to my hives.
The hive is easier for the guard bees to protect against any nasties.
I also use a mouse guard at the entrance but that won’t prevent wasps.